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Windows 8 tile app, help needed

hi,

We are working on designing a win 8 app with sencha, i have checked the ST 2.2 , all the samples follows the same theme as we have in 2.1. How can i get the tile styling same as win 8 native. how can we change the theme available with 2.2 for windows to the examples provided with 2.2.? Can any one share your thoughts ?